From: Christian Brauner <brauner@kernel.org>
To: linux-fsdevel@vger.kernel.org, Jann Horn <jannh@google.com>,
Daniel Borkmann <daniel@iogearbox.net>,
Kuniyuki Iwashima <kuniyu@amazon.com>
Cc: "Eric Dumazet" <edumazet@google.com>,
"Oleg Nesterov" <oleg@redhat.com>,
"David S. Miller" <davem@davemloft.net>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Daan De Meyer" <daan.j.demeyer@gmail.com>,
"David Rheinsberg" <david@readahead.eu>,
"Jakub Kicinski" <kuba@kernel.org>, "Jan Kara" <jack@suse.cz>,
"Lennart Poettering" <lennart@poettering.net>,
"Luca Boccassi" <bluca@debian.org>, "Mike Yuan" <me@yhndnzj.com>,
"Paolo Abeni" <pabeni@redhat.com>,
"Simon Horman" <horms@kernel.org>,
"Zbigniew Jędrzejewski-Szmek" <zbyszek@in.waw.pl>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
linux-security-module@vger.kernel.org,
"Christian Brauner" <brauner@kernel.org>,
"Alexander Mikhalitsyn" <alexander@mihalicyn.com>
Subject: [PATCH v6 3/9] coredump: reflow dump helpers a little
Date: Mon, 12 May 2025 10:55:22 +0200 [thread overview]
Message-ID: <20250512-work-coredump-socket-v6-3-c51bc3450727@kernel.org> (raw)
In-Reply-To: <20250512-work-coredump-socket-v6-0-c51bc3450727@kernel.org>
They look rather messy right now.
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
fs/coredump.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/fs/coredump.c b/fs/coredump.c
index 0e97c21b35e3..a70929c3585b 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -867,10 +867,9 @@ static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)
struct file *file = cprm->file;
loff_t pos = file->f_pos;
ssize_t n;
+
if (cprm->written + nr > cprm->limit)
return 0;
-
-
if (dump_interrupted())
return 0;
n = __kernel_write(file, addr, nr, &pos);
@@ -887,20 +886,21 @@ static int __dump_skip(struct coredump_params *cprm, size_t nr)
{
static char zeroes[PAGE_SIZE];
struct file *file = cprm->file;
+
if (file->f_mode & FMODE_LSEEK) {
- if (dump_interrupted() ||
- vfs_llseek(file, nr, SEEK_CUR) < 0)
+ if (dump_interrupted() || vfs_llseek(file, nr, SEEK_CUR) < 0)
return 0;
cprm->pos += nr;
return 1;
- } else {
- while (nr > PAGE_SIZE) {
- if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
- return 0;
- nr -= PAGE_SIZE;
- }
- return __dump_emit(cprm, zeroes, nr);
}
+
+ while (nr > PAGE_SIZE) {
+ if (!__dump_emit(cprm, zeroes, PAGE_SIZE))
+ return 0;
+ nr -= PAGE_SIZE;
+ }
+
+ return __dump_emit(cprm, zeroes, nr);
}
int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
--
2.47.2
next prev parent reply other threads:[~2025-05-12 8:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-12 8:55 [PATCH v6 0/9] coredump: add coredump socket Christian Brauner
2025-05-12 8:55 ` [PATCH v6 1/9] coredump: massage format_corname() Christian Brauner
2025-05-12 8:55 ` [PATCH v6 2/9] coredump: massage do_coredump() Christian Brauner
2025-05-12 8:55 ` Christian Brauner [this message]
2025-05-12 8:55 ` [PATCH v6 4/9] coredump: add coredump socket Christian Brauner
2025-05-12 10:58 ` Luca Boccassi
2025-05-13 0:17 ` Kuniyuki Iwashima
2025-05-13 1:09 ` Luca Boccassi
2025-05-13 2:14 ` Kuniyuki Iwashima
2025-05-13 8:56 ` Lennart Poettering
2025-05-13 12:08 ` Christian Brauner
2025-05-13 0:06 ` Kuniyuki Iwashima
2025-05-12 8:55 ` [PATCH v6 5/9] pidfs, coredump: add PIDFD_INFO_COREDUMP Christian Brauner
2025-05-12 8:55 ` [PATCH v6 6/9] coredump: show supported coredump modes Christian Brauner
2025-05-12 8:55 ` [PATCH v6 7/9] coredump: validate socket name as it is written Christian Brauner
2025-05-12 8:55 ` [PATCH v6 8/9] selftests/pidfd: add PIDFD_INFO_COREDUMP infrastructure Christian Brauner
2025-05-12 8:55 ` [PATCH v6 9/9] selftests/coredump: add tests for AF_UNIX coredumps Christian Brauner
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